In Computer Programming,an Array,also known as a Vector or List,is one of the simplest data structure.Array holds equally sized data elements, generally of the same data type.In this individual elements are accessed by index(for ex arry[0],arry[2] here 0 and 2 are the index).

Lists

1 LINK OR POINTER: A pointer also called a link or a reference, is defined to be a variable that give the location of some other variable(point to the next consecutive node), typically of a structure containing data.

The Simple Validation is used for quickly adding validation code to Swing user-interface.The User Interface needs to make sure that what the user typed is legal, if it is not then the user should be shown the error or problem.